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authorMike Christie <michaelc@cs.wisc.edu>2006-04-06 21:13:39 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-04-14 14:05:09 -0500
commit30a6c65236f9d26e3325cae468f330b833a3878c (patch)
tree355519ccc74d4b3984c06d7dcb5852282e47c845 /drivers/scsi/iscsi_tcp.h
parentfd7255f51a13ea915099c7e488001dfbbeb05104 (diff)
downloadtalos-obmc-linux-30a6c65236f9d26e3325cae468f330b833a3878c.tar.gz
talos-obmc-linux-30a6c65236f9d26e3325cae468f330b833a3878c.zip
[SCSI] iscsi: fix up iscsi eh
The current iscsi_tcp eh is not nicely setup for dm-multipath and performs some extra task management functions when they are not needed. The attached patch: - Fixes the TMF issues. If a session is rebuilt then we do not send aborts. - Fixes the problem where if the host reset fired, we would return SUCCESS even though we had not really done anything yet. This ends up causing problem with scsi_error.c's TUR. - If someone has turned on the userspace nop daemon code to try and detect network problems before the scsi command timeout we can now drop and clean up the session before the scsi command timesout and fires the eh speeding up the time it takes for a command to go from one patch to another. For network problems we fail the command with DID_BUS_BUSY so if failfast is set scsi_decide_disposition fails the command up to dm for it to try on another path. - And we had to add some basic iscsi session block code. Previously if we were trying to repair a session we would retrun a MLQUEUE code in the queuecommand. This worked but it was not the most efficient or pretty thing to do since it would take a while to relogin to the target. For iscsi_tcp/open-iscsi a lot of the iscsi error handler is in userspace the block code is pretty bare. We will be adding to that for qla4xxx. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/iscsi_tcp.h')
-rw-r--r--drivers/scsi/iscsi_tcp.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h
index ba26741ac154..12ef64179b4c 100644
--- a/drivers/scsi/iscsi_tcp.h
+++ b/drivers/scsi/iscsi_tcp.h
@@ -159,6 +159,7 @@ struct iscsi_conn {
struct kfifo *immqueue; /* immediate xmit queue */
struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
struct kfifo *xmitqueue; /* data-path cmd queue */
+ struct list_head run_list; /* list of cmds in progress */
struct work_struct xmitwork; /* per-conn. xmit workqueue */
struct mutex xmitmutex; /* serializes connection xmit,
* access to kfifos: *
@@ -228,6 +229,7 @@ struct iscsi_session {
* - mgmtpool, *
* - r2tpool */
int state; /* session state */
+ int recovery_failed;
struct list_head item;
void *auth_client;
int conn_cnt;
@@ -310,6 +312,7 @@ struct iscsi_cmd_task {
struct iscsi_conn *conn; /* used connection */
struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
+ struct list_head running; /* running cmd list */
struct iscsi_r2t_info *r2t; /* in progress R2T */
struct iscsi_queue r2tpool;
struct kfifo *r2tqueue;
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